Windsock Purpose
Wind speed limit for lifting, rigging, and at height activities is 10 m/s = 36 km/hr = 19.4 knots. It means that wind speed below 10 m/s is safe for the said activities. Wind speed 10 m/s = 36 km/hr = 19.4 knots or more is not safe for those activities.
Guidance on wind speeds in relation to scaffold usage, OSHA (US Standard) quotes a figure of 17 mph (7.7 m/s) as the speed at which all work on a scaffold should cease. 25 mph as the speed at which mobile towers etc should be tied into the structure for safety and 40 mph as the limit over which mobile scaffolds should be dismantled.
Wind speed limit for lifting, rigging, and at height activities is 10 m/s = 36 km/hr = 19.4 knots. It means that wind speed below 10 m/s is safe for the said activities. Wind speed 10 m/s = 36 km/hr = 19.4 knots or more is not safe for those activities.
Guidance on wind speeds in relation to scaffold usage, OSHA (US Standard) quotes a figure of 17 mph (7.7 m/s) as the speed at which all work on a scaffold should cease. 25 mph as the speed at which mobile towers etc should be tied into the structure for safety and 40 mph as the limit over which mobile scaffolds should be dismantled.
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